Quick Start

Retell AI is a versatile platform that allows you to build and deploy conversational AI applications. It provides a set of building blocks that you can customize as you need. Here’s a breakdown of different building blocks and what you can do with them.

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How to choose

1. 🧑‍🎨️ Dashboard (No code)

   • Build a proof of concept swiftly in 5 minutes without coding.
   • Acquire a Twilio phone number to set up an AI phone agent capable of making and receiving calls.

2. 🧑‍💻️ Retell LLM (Low code)

   • Access powerful APIs for agent creation, updates, and initiating phone calls, among others.
   • Enable developers to seamlessly integrate voice AI into your products.
   • Integrate with your own telephony services, such as Vonage or SignalWire.

3. 🧙 Custom LLM (Fully customizable)

   • Implement any custom LLM of your choice.
   • Integrate with your own telephony services, such as Vonage or SignalWire.

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Building Blocks

• LLM APIs: a framework and a set of APIs that allows you to configure a LLM based response system for your voice agents. Read more at Retell LLM Guides

• Agent APIs: A set of APIs that allows you to customize your agent used in the conversation. Read more at Agent Guides.

• Call APIs: A set of APIs that allows you to make phone calls to your customers, and retrieve details about the call. Read more at Make Call Guides.

• Phone Number APIs: A set of APIs that allows you to buy phone numbers, bind agent to phone numbers, and retrieve details about the phone numbers.

• Advanced APIs: APIs used when you want to use your own LLM, use your own telecommunication, create a web call etc. These are protocol definitions that are being used by the previous building blocks as backbone, provides a direct interface with the internal systems of Retell.

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Steps to Get Started

1. Try our voice AI in the dashboard. (Tutorial)

   Dashboard can help you quickly set up a demo and evaluate our voice interaction experience.

2. Integrate voice AI into your product using our API

   • We recommend start with Retell LLM. We have created the framework to easily create a LLM based response system suitable for real-time voice interactions. You have full control over the LLM behaviors.
   • If you want to integrate with your own LLM or other response system, check out Custom LLM.

3. Configure your agent. Read more at Voice Agent Guide.

4. Make a call with the agent configured.

   • Phone calls
     • If you don’t need to use your own number / telecommunications, check out Retell Phone Call APIs.
     • If you want to use your own number / telecommunications, check out Custom Twilio.
   • Web calls: If you want to make a call from your web application, check out Web Call.

5. Dive into API Reference to unlock full potential.

   Explore details about each parameter and setting, understand the underlying protocol.